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sprouticus
New User
Joined: 03 Oct 2012
Posts: 2
Location: MN
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 Posted: Wed Oct 03, 2012 6:20 pm Post subject: Help with 971 wiring problem |
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I am working on a 971 for a friend.
I have switched it over to a 12 volt system with a one wire type alternator.
I set it up with the diagram in the link.
Last night I tried it and it seemed to work fine.
Well today I got the gas tank and radiator all set and tried to start it and get it running. I turned the key on and hit the starter button and the starter motor would not stop turning even after I stopped pushing the button, I turned the key off and it still kept turning, so I had to quickly disconnect the battery. So what am I doing wrong?
(Also I eliminated the amp light and used an amp meter instead.)
Thanks in advance.
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Larry NCKS
Tractor Guru
Joined: 23 Dec 2001
Posts: 3732
Location: Washington, KS/Lincoln, NE
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| Posted: Wed Oct 03, 2012 6:32 pm Post subject: Re: Help with 971 wiring problem |
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diagram looks good, except I'd wire the lights to the B+ side of the terminal block and not the switched side. That has nothing to do with your problem, however.
Three posibilities I can think of. Starter button stuck on or solenoid stuck on or solenoid to starter switch wire shorted to ground somewhere.
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Royse
Tractor Expert
Joined: 17 Jan 2011
Posts: 3316
Location: Michigan
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| Posted: Wed Oct 03, 2012 6:33 pm Post subject: Re: Help with 971 wiring problem |
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Sounds like the solenoid stuck.
Check if it has a push button on the bottom of it to manually engage.
If so, you can usually wiggle it and it will release.
I got a cheap one like this from TSC.
It stuck again later, so I ended up replacing it.
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awhtx
Tractor Guru
Joined: 16 Jan 2002
Posts: 5048
Location: Lampasas, TX
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| Posted: Wed Oct 03, 2012 6:47 pm Post subject: Re: Help with 971 wiring problem |
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Attempting to start an engine with a weak battery will sometimes cause the contacts inside the relay/solenoid to "weld" themselves in the closed position.
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sprouticus
New User
Joined: 03 Oct 2012
Posts: 2
Location: MN
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| Posted: Wed Oct 03, 2012 8:06 pm Post subject: Re: Help with 971 wiring problem |
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Thanks for all the quick responses.
Everything is new, battery, solenoid, wiring, bat. cables, resistor, key switch, starter switch and all the gauges. (The tractor was a real mess.)
So yesterday it worked fine, hit the starter button and it turned over, when I released the button it stopped. Then today, augh! I wanted to pull my hair out.
I just went out to the shed and tried to reconnect the neg. cable to the battery, to see what would happen. Whoa, a big arc snapped at me, so I guess you were right about the solenoid being stuck.
So I looked at the package the solenoid came in. See the attached image.
CHINA?!
So I dug through my box of extra parts I have accumulated and found a good old U.S.A. made solenoid so I will put that on tomorrow and let you guys know it turns out.
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souNdguy
Tractor Guru
Joined: 20 Aug 2002
Posts: 48136
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| Posted: Thu Oct 04, 2012 2:40 pm Post subject: Re: Help with 971 wiring problem |
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ditto what awhtx said.. weak bats can arc weld contacts in a solenoid.
post back
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